The file format you mentioned are mostly used in some 3D CAD software, aren't they? So I am sorry that they can't be opened in ZWCAD.

If you are always dealing with these kind of file under 3D environment, I 'd like to introduce you our professional product ZW3D, it can open these file directly and even those file from Solidworks' ProE'Catia'Inventor...etc.
You can obtain more information here: http://zw3d.zwcad.org/index.cfm